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Computing dynamic user equilibria for large-scale transportation networks

机译：计算大型交通网络的动态用户平衡

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摘要

In this paper, we present an approach for determining dynamic user equilibria. The method is suitable for disaggregated microscopic and mesoscopic simulation-based models. It is a modification of the convex-simplex method, which disposes with the line search step, and controls the subset of travelers to be re-routed at each step while updating the link travel times after each assignment. To guarantee finite termination, a suitable stopping criterion is adopted. The proposed method is implemented within TRANSIMS, the Transportation Analysis and Simulation System, as a two-stage process that employs a combined use of link performance functions and a microsimulator in order to design a framework suitable for application to real transportation systems. To demonstrate this capability, we apply the developed methodology to a large-scale network, Bignet, which is part of the transportation city network of Portland, Oregon; and a medium-scale network, Blacksburg, Virginia; and provide some comparative analyses. Our results exhibit that an improved distribution of travelers is obtained while consuming less than 17-33% of the effort required by the current version of TRANSIMS.
机译：在本文中，我们提出了一种确定动态用户平衡的方法。该方法适用于基于微观和介观模拟的分解模型。这是对凸-单工方法的一种修改，它与线搜索步骤一起放置，并控制旅行者的子集在每个步骤中重新路由，同时在每次分配后更新链接旅行时间。为了保证有限的终止，采用了合适的停止准则。拟议的方法是在TRANSIMS（运输分析和仿真系统）中实施的，该过程分为两阶段，结合了链接性能功能和微型模拟器的使用，以设计适用于实际运输系统的框架。为了证明这种能力，我们将开发的方法应用于大型网络Bignet，该网络是俄勒冈州波特兰市交通城市网络的一部分；以及弗吉尼亚州布莱克斯堡的中型网络；并提供一些比较分析。我们的结果表明，旅行者的分布得到了改善，而消耗的费用却不到当前版本TRANSIMS的17-33％。

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